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		<title>three.js webgpu - fly controls - earth</title>
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			body {
				background:#000;
				color: #eee;
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			b {
				color: orange
			}
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	<body>

		<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - earth [fly controls]<br/>
		<b>WASD</b> move, <b>R|F</b> up | down, <b>Q|E</b> roll, <b>up|down</b> pitch, <b>left|right</b> yaw
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.webgpu.js",
					"three/webgpu": "../build/three.webgpu.js",
					"three/tsl": "../build/three.tsl.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three/webgpu';
			import { pass } from 'three/tsl';
			import { film } from 'three/addons/tsl/display/FilmNode.js';

			import Stats from 'three/addons/libs/stats.module.js';
			import { FlyControls } from 'three/addons/controls/FlyControls.js';

			const radius = 6371;
			const tilt = 0.41;
			const rotationSpeed = 0.02;

			const cloudsScale = 1.005;
			const moonScale = 0.23;

			const MARGIN = 0;
			let SCREEN_HEIGHT = window.innerHeight - MARGIN * 2;
			let SCREEN_WIDTH = window.innerWidth;

			let camera, controls, scene, renderer, stats;
			let geometry, meshPlanet, meshClouds, meshMoon;
			let dirLight;

			let postProcessing;

			const textureLoader = new THREE.TextureLoader();

			let d, dPlanet, dMoon;
			const dMoonVec = new THREE.Vector3();

			const clock = new THREE.Clock();

			init();

			function init() {

				camera = new THREE.PerspectiveCamera( 25, SCREEN_WIDTH / SCREEN_HEIGHT, 50, 1e7 );
				camera.position.z = radius * 5;

				scene = new THREE.Scene();
				scene.fog = new THREE.FogExp2( 0x000000, 0.00000025 );

				dirLight = new THREE.DirectionalLight( 0xffffff, 3 );
				dirLight.position.set( - 1, 0, 1 ).normalize();
				scene.add( dirLight );

				const materialNormalMap = new THREE.MeshPhongMaterial( {

					specular: 0x7c7c7c,
					shininess: 15,
					map: textureLoader.load( 'textures/planets/earth_atmos_2048.jpg' ),
					specularMap: textureLoader.load( 'textures/planets/earth_specular_2048.jpg' ),
					normalMap: textureLoader.load( 'textures/planets/earth_normal_2048.jpg' ),

					// y scale is negated to compensate for normal map handedness.
					normalScale: new THREE.Vector2( 0.85, - 0.85 )

				} );
				materialNormalMap.map.colorSpace = THREE.SRGBColorSpace;

				// planet

				geometry = new THREE.SphereGeometry( radius, 100, 50 );

				meshPlanet = new THREE.Mesh( geometry, materialNormalMap );
				meshPlanet.rotation.y = 0;
				meshPlanet.rotation.z = tilt;
				scene.add( meshPlanet );

				// clouds

				const materialClouds = new THREE.MeshLambertMaterial( {

					map: textureLoader.load( 'textures/planets/earth_clouds_1024.png' ),
					transparent: true

				} );
				materialClouds.map.colorSpace = THREE.SRGBColorSpace;

				meshClouds = new THREE.Mesh( geometry, materialClouds );
				meshClouds.scale.set( cloudsScale, cloudsScale, cloudsScale );
				meshClouds.rotation.z = tilt;
				scene.add( meshClouds );

				// moon

				const materialMoon = new THREE.MeshPhongMaterial( {

					map: textureLoader.load( 'textures/planets/moon_1024.jpg' )

				} );
				materialMoon.map.colorSpace = THREE.SRGBColorSpace;

				meshMoon = new THREE.Mesh( geometry, materialMoon );
				meshMoon.position.set( radius * 5, 0, 0 );
				meshMoon.scale.set( moonScale, moonScale, moonScale );
				scene.add( meshMoon );

				// stars

				const r = radius, starsGeometry = [ new THREE.BufferGeometry(), new THREE.BufferGeometry() ];

				const vertices1 = [];
				const vertices2 = [];

				const vertex = new THREE.Vector3();

				for ( let i = 0; i < 250; i ++ ) {

					vertex.x = Math.random() * 2 - 1;
					vertex.y = Math.random() * 2 - 1;
					vertex.z = Math.random() * 2 - 1;
					vertex.multiplyScalar( r );

					vertices1.push( vertex.x, vertex.y, vertex.z );

				}

				for ( let i = 0; i < 1500; i ++ ) {

					vertex.x = Math.random() * 2 - 1;
					vertex.y = Math.random() * 2 - 1;
					vertex.z = Math.random() * 2 - 1;
					vertex.multiplyScalar( r );

					vertices2.push( vertex.x, vertex.y, vertex.z );

				}

				starsGeometry[ 0 ].setAttribute( 'position', new THREE.Float32BufferAttribute( vertices1, 3 ) );
				starsGeometry[ 1 ].setAttribute( 'position', new THREE.Float32BufferAttribute( vertices2, 3 ) );

				const starsMaterials = [
					new THREE.PointsMaterial( { color: 0x9c9c9c } ),
					new THREE.PointsMaterial( { color: 0x838383 } ),
					new THREE.PointsMaterial( { color: 0x5a5a5a } )
				];

				for ( let i = 10; i < 30; i ++ ) {

					const stars = new THREE.Points( starsGeometry[ i % 2 ], starsMaterials[ i % 3 ] );

					stars.rotation.x = Math.random() * 6;
					stars.rotation.y = Math.random() * 6;
					stars.rotation.z = Math.random() * 6;
					stars.scale.setScalar( i * 10 );

					stars.matrixAutoUpdate = false;
					stars.updateMatrix();

					scene.add( stars );

				}

				renderer = new THREE.WebGPURenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				//

				controls = new FlyControls( camera, renderer.domElement );

				controls.movementSpeed = 1000;
				controls.domElement = renderer.domElement;
				controls.rollSpeed = Math.PI / 24;
				controls.autoForward = false;
				controls.dragToLook = false;

				//

				stats = new Stats();
				document.body.appendChild( stats.dom );

				window.addEventListener( 'resize', onWindowResize );

				// postprocessing

				postProcessing = new THREE.PostProcessing( renderer );

				const scenePass = pass( scene, camera );
				const scenePassColor = scenePass.getTextureNode();

				postProcessing.outputNode = film( scenePassColor );

			}

			function onWindowResize() {

				SCREEN_HEIGHT = window.innerHeight;
				SCREEN_WIDTH = window.innerWidth;

				camera.aspect = SCREEN_WIDTH / SCREEN_HEIGHT;
				camera.updateProjectionMatrix();

				renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );

			}

			function animate() {

				render();
				stats.update();

			}

			function render() {

				// rotate the planet and clouds

				const delta = clock.getDelta();

				meshPlanet.rotation.y += rotationSpeed * delta;
				meshClouds.rotation.y += 1.25 * rotationSpeed * delta;

				// slow down as we approach the surface

				dPlanet = camera.position.length();

				dMoonVec.subVectors( camera.position, meshMoon.position );
				dMoon = dMoonVec.length();

				if ( dMoon < dPlanet ) {

					d = ( dMoon - radius * moonScale * 1.01 );

				} else {

					d = ( dPlanet - radius * 1.01 );

				}

				controls.movementSpeed = 0.33 * d;
				controls.update( delta );

				postProcessing.render();

			}

		</script>
	</body>
</html>
